Adjustable mold for building concrete structures.



S. B. DAVIS. ADJUSTABLE MOLD FOR BUILDING CONCRETE STRUCTURES.

APPLICATION FILED DEC-10, l9l3- Patented Aug. 14, 1917.

SOLOMON 3B. DAVIS, 0.1? SHAWNEE, OKLAHOMA.

ADJUSTABLE MOLD non BUILDING CONCRETE STRUCTURES.

Spec fi a on o t ers atent Patented Aug. 14, 1917.

hpo iee i le Deeemb 10, 91 s i e N 8 5,? 5 .1

To all whom it may concern:

Be it known that I, SoLoMon B. Dav s, a citizen of the United States anda resident of Shawnee, in the county of Pottawatomie and State ofOklahoma, have invented certain new and useful Improvements inAdjustable Molds for Building Concrete Structures, of which thefollowing is a specification, reference being had to the accompanye ingdrawings.

This invention relates to certain new and useful improvements in moldsfor building concrete structures; and the primary object of my inventionis to provide an adjustable form or mold, especially adapted to be usedin building monolithic structures.

Another object is to provide an adjustable mold, of a simple andinexpensive nature and of a compact and durable con: struction, capableof accurate adjustment to enable an operator to build monolithic struc-vtures, the thickness of the walls and horizontal reinforcements .Ofwhich are auto matically increased with the increase in size ofstructure of polygonal form.

A further object is to provide a silo mold including a number of innerand outer form plat s, h ch may be djus t f rm str ctures in the form ofa regular polygon of d ffer nt i m er d hi kn ss of W lls:

Another object is to provide a mold or form which can be arranged to beused in building structures having rectangular corners.

W th these and other objects n V ew the present invention consists inthe combination and arrangement of parts as will be hereinafter morefully described and finally pointed out in the appended claim, it beingfurther understood that changes in the sp cific s ructure s o n anescrib my be made within the scope of the claim with.- out departingfrom the spirit of the invention. i

In the accompanying drawings forming a part of this specification and inwhich like numerals of reference indicate similar parts in t e e al vies;

Figure 1, shows a top view of two conneeted inner and t o connected o erpl tes s d in my in enti n, disclosing a locking Fig. 5,, shows aperspective view of four 7 release plates secured to form a rectangularwall corner.

Fig. 6, shows a sectional View of the inner and outer plates. 7

Fig. 7, shows respectively an edge and face View of one of the expandingstrips In carrying out the object of my invene tion I employ a moldincluding two forms, one comprising a set of similar outer flangedplates, and a set of similar inner flanged plates, these sets of plateswhen connected i one ma n r ming a regular p yg n, t e inner P te be g oapr eter hined shorter length than the outer. The form P at are fla anre in erc a g bl he in e set further ncl d s a form pla e nclu ng a m jr an min r s ct n, which are detachably united and form what I term herele s plat e c mbi e leng h and width o w co n ct d elease P a s b ngequa to t at of a r gu ar n er Pl e, As s wn n he drawi gs eac inn rform P t A wh c i fia s P ovid d With impe ange 1, a b se flange 2, antwo s milar nd flang 3- As sh w n Fig.- 1, these end flang s fo m n acte ang e ith th fa o th plates, th angle o hese l flanges ,3, inpractice being extended approxima ely at eighte n deg ees to e face of eplat T e nne form s P ided with one plate forming a release plate andcomp ising a majo plate section B and a minor plate section B, shown intop view as connected in Fig. 1. The major plate ion a its flange 3,subtending at l8 while the opposit releasing flange 5,,is held t n ngleof 45.- The minor p a e section B has a release flange 4, subtending at13.5

to the base of the plate, es shown in ig: .1,

so that when said release flanges 4 and 5 are connected, the major andminor sections are held in alinement. In Figs. 1 and 2, these plates areshown as having their release flanges connected by means of the bolts BEach outer plate C is provided with a top flange 1 and a bottom flange 2and two end flanges 3.

As these outer and inner form plates are made of thin sheet steel it isdesirable to have their upper and lower flanges reinforced to strengthenthe same, and this I accomplish in continuing the metal from the flanges1 and 1 to form a double thickness a, which is continued in the endflange 6, held against the plates, as shown in Fig. 6. Near each end thetop and bottom flanges of each plate are provided with suitable boltopenings 6, while the end flanges 3 and 3 have the openings 7 The lengthof the inner plates A, and connected release plates B, B are of apredetermined length relative to the length of the faces of the outerform plates C.

As shown in Fig. 1, when the inner plates are connected in such a mannerthat the faces of the edge flanges 3, 3 are held in juxtaposition, theend flanges 8 of the outer plate 0 are held in divergent spacedrelation. In Figs. 1 and 2 the inner plate are shown as connected bymeans of the bolts A B while the outer flange 3 is connected by means ofa bolt C As shown in Fig. 1, these flanges 3 extend atright angles tothe faces of the plates.

In Fig. 4:, I have shown a mold comprising 12 united inner form platesand 12 united outer form plates. The wall between these two sets of formplates will be of a predetermined thickness. Now should 13 inner, and 13outer form plates be employed, there would be a corresponding increasein thickness of the wall formed between the greater number of formplates. The dis tance between the sets of form plates increases as thenumber of plates is increased.

In building a wall, the inner and outer form plates must be held inparallel spaced relation to each other and in order to hold these innerand outer face plates in proper position, I employ what I term a lockingbar D, which has one end recurved to form a hook 9, arranged to fit andclasp over an outer flange 1, while a U-shaped sliding jaw D is slidablyheld upon its member. This locking bar D near its hook end has a numberof bolt openings 10, and near its opposite end the wedge seats D as wellas the bolt slots D. A wedge D fits into the wedge seats to hold a setof inner and outer plates in accurate parallel spaced relation.

After the walls have been molded the outer form plates can be removed inreleasing the bolts C Before the inner plates however can be releasedthe bolts B must be removed so that the minor sections B can be swunginwardly, after which the major section B can be swung inwardly,permitting the ready removal of the remaining sections A.

There is a special reason in providing the release plate B and B ofdifferent lengths as will be set forth more fully hereinafter.

If it is desired to decrease the thickness of the wall after havingreached a desired height, it is simply necessary to insert one of thebattens or expanders G between each set of inner plates. This willresult in clecreasing the thickness of the wall. As shown in Fig. 7these battens or expanders have suitable openings arranged to receivethe bolts A B, which are employed to connect the inner end flanges 3.

Where it is desired to build a square structure I disconnect the majorand minor plates B and B and reverse these members and connect them sothat a right angle can be formed as is shown in Fig. 5. Two members Bare connected to form the inner mold forms and two larger or majorsections B to form the outer plates of the mold. When this is done thecorners are brought into alinement and a wall will be formed between thetwo members of a predetermined thickness.

Where the plates B and A are connected as shown in Fig. 2, the flangesof the plates are connected at their top by means of a locking bar D. Inthis construction a bolt 12 is used passing through one of the openings10, while a second bolt 12 is made to pass through the slot D From thefore going it will be noticed these locking bars D are not only used inholding the inner and outer mold members in parallel spaced relation,but are also used in holding the different plates in alinement, wherethey are used to form square corners. Where the locking bars D are usedto hold plates in alinement the sliding aw D is of course not employed.As set forth the doors are of the refrigerator type and if desired canbe continuous or be arranged at intervals.

Further as described the thickness of the walls and the efficiency ofthe horizontal reinforcing increases automatically with the increase insize of the silo. Any desired thickness of wall can further be securedby the use of the expander G.

Having thus described my said invention what I claim as new and desireto secure by United States Letters Patent is:

An adjustable mold for building concrete structures comprising an outerand an inner plate held in parallel spaced relation, each made of thinsheet metal and provided with an upper and a lower flange extending at aright angle, each flange being of a double thickness and ending in anedge held against its plate, a locking bar which has one end recurved toform a hook arranged to clasp over one of said upper flanges, a U-shapedIn testimony whereof I afiiX my signature jaw slildaloly held upon saidlocking bar, arin the presence of two Witnesses.

rangec to engage an opposite upper flange said locking bar having aplurality of wedge SOLOMON DAVIS seats, and a wedge adapted to workthrough Witnesses:

said wedge seats and against said U-shaped PAUL A. WALKER,

jaw to hold said plates in spaced relation. JAMES M. BERRY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

